On 8 Jan 2010, at 11:35, jonat...@mugginsoft.com wrote: > My GC app has two NSTextViews in two windows. > Distinct attributed text can loaded into both NSTextView instances. > > The problem test text data size is 2MB. > The problem does not manifest itself for smaller data sizes. > > The 2MB test data can be loaded repeatedly into a single NSTextView instance > without issue. > When the same test data is loaded into the second NSTextView instance the > crash occurs. > > Obviously NSLayoutManager has initiated deferred layout. > Do I have to be aware of any particular layout manager issues in this case? > > I am not doing any manipulation of the NSTextView contents. > The content is established using the following binding. > > [_textView bind:NSAttributedStringBinding > toObject:self > withKeyPath:@"resultString" > options:[NSDictionary dictionaryWithObjectsAndKeys: > [NSNumber numberWithBool:YES], NSConditionallySetsEditableBindingOption, > nil]]; > > This issue may be related to garbage collection. I was initiating [[NSGarbageCollector defaultCollector]collectExhaustively] after the end of a particular operation. Removing this greatly reduced but did not wholly eliminate the problem.
What did have a positive effect was to to configure the NSTextView instances as -setAllowsNonContiguousLayout:YES Presumably this initiates a different code path. As a precautionary measure I also turned off background layout. [[myText layoutManager] setBackgroundLayoutEnabled:NO]; > Crash details follow. > > Thanks > > Jonathan > > Date/Time: 2010-01-08 11:11:32.074 +0000 > OS Version: Mac OS X 10.6.2 (10C540) > Report Version: 6 > > Exception Type: EXC_BAD_ACCESS (SIGBUS) > Exception Codes: KERN_PROTECTION_FAILURE at 0x000000000000017c > Crashed Thread: 0 Dispatch queue: com.apple.main-thread > > Application Specific Information: > objc[653]: garbage collection is ON > > Thread 0 Crashed: Dispatch queue: com.apple.main-thread > 0 com.apple.AppKit 0x92eadd3e -[NSATSGlyphStorage > setAbsorbedCount:forIndex:] + 84 > 1 com.apple.CoreText 0x95cbf9e3 > TObjCGlyphStorage::SetAttachmentCount(long, long) + 51 > 2 com.apple.CoreText 0x95cbf8b0 long > TRun::SetAttachmentsLeftToRight<true>(long, long const*, long) + 402 > 3 com.apple.CoreText 0x95cbf6a8 TRun::DeleteGlyphs(long, > long const*, long) + 60 > 4 com.apple.CoreText 0x95cbf5c1 TLine::DeleteGlyphs(long, > long, long const*) + 243 > 5 com.apple.CoreText 0x95cab05f > TShapingEngine::ShapeGlyphs(TLine&, TCharStream const&) + 647 > 6 com.apple.CoreText 0x95cbba47 > TTypesetterRunArray::TTypesetterRunArray(__CFArray const*, __CFString const*, > void const* (*)(__CTRun const*, __CFString const*, void*), void*) + 209 > 7 com.apple.CoreText 0x95cbb962 > CTTypesetterCreateWithRunArray + 90 > 8 com.apple.AppKit 0x92dae76f -[NSATSGlyphStorage > createCTTypesetter] + 1585 > 9 com.apple.AppKit 0x92daa8bc -[NSATSTypesetter > _ctTypesetter] + 323 > 10 com.apple.AppKit 0x92da994b -[NSATSLineFragment > layoutForStartingGlyphAtIndex:characterIndex:minPosition:maxPosition:lineFragmentRect:] > + 72 > 11 com.apple.AppKit 0x92da84a4 -[NSATSTypesetter > _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext:] > + 2760 > 12 com.apple.AppKit 0x92e1addf -[NSATSTypesetter > layoutParagraphAtPoint:] + 155 > 13 com.apple.AppKit 0x9331ecf0 -[NSTypesetter > _layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex:] > + 2935 > 14 com.apple.AppKit 0x92e19fbe -[NSTypesetter > layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 218 > 15 com.apple.AppKit 0x92e19ea2 -[NSATSTypesetter > layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments:] + 1316 > 16 com.apple.AppKit 0x92e17eb4 -[NSLayoutManager(NSPrivate) > _fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:] + 1020 > 17 com.apple.AppKit 0x92e8a509 -[NSLayoutManager(NSPrivate) > _fillLayoutHoleAtIndex:desiredNumberOfLines:] + 261 > 18 com.apple.AppKit 0x92e8cf9c +[NSLayoutManager(NSPrivate) > _doSomeBackgroundLayout] + 927 > 19 com.apple.AppKit 0x92e51af4 _NSPostBackgroundLayout + 562 > 20 com.apple.CoreFoundation 0x95f8b892 __CFRunLoopDoObservers + 1186 > 21 com.apple.CoreFoundation 0x95f483e2 __CFRunLoopRun + 1154 > 22 com.apple.CoreFoundation 0x95f47864 CFRunLoopRunSpecific + 452 > 23 com.apple.CoreFoundation 0x95f47691 CFRunLoopRunInMode + 97 > 24 com.apple.HIToolbox 0x96589f0c RunCurrentEventLoopInMode + > 392 > 25 com.apple.HIToolbox 0x96589cc3 ReceiveNextEventCommon + 354 > 26 com.apple.HIToolbox 0x96589b48 > BlockUntilNextEventMatchingListInMode + 81 > 27 com.apple.AppKit 0x92ceeac5 _DPSNextEvent + 847 > 28 com.apple.AppKit 0x92cee306 -[NSApplication > nextEventMatchingMask:untilDate:inMode:dequeue:] + 156 > 29 com.apple.AppKit 0x92cb049f -[NSApplication run] + 821 > 30 com.apple.AppKit 0x92ca8535 NSApplicationMain + 574 > 31 com.boo.myapp 0x00006bf1 main + 376 (main.m:32) > 32 com.boo.myapp 0x00002a51 start + 53 > > Thread 1: Dispatch queue: com.apple.libdispatch-manager > 0 libSystem.B.dylib 0x94a3a0ea kevent + 10 > 1 libSystem.B.dylib 0x94a3a804 _dispatch_mgr_invoke + 215 > 2 libSystem.B.dylib 0x94a39cc3 _dispatch_queue_invoke + 163 > 3 libSystem.B.dylib 0x94a39a68 _dispatch_worker_thread2 + > 234 > 4 libSystem.B.dylib 0x94a394f1 _pthread_wqthread + 390 > 5 libSystem.B.dylib 0x94a39336 start_wqthread + 30 > > Thread 2: > 0 libSystem.B.dylib 0x94a32856 select$DARWIN_EXTSN + 10 > 1 com.apple.CoreFoundation 0x95f87ddd __CFSocketManager + 1085 > 2 libSystem.B.dylib 0x94a40fbd _pthread_start + 345 > 3 libSystem.B.dylib 0x94a40e42 thread_start + 34 > > Thread 3: > 0 libSystem.B.dylib 0x94a39182 __workq_kernreturn + 10 > 1 libSystem.B.dylib 0x94a39718 _pthread_wqthread + 941 > 2 libSystem.B.dylib 0x94a39336 start_wqthread + 30 > > Thread 4: Dispatch queue: Garbage Collection Work Queue > 0 libauto.dylib 0x927fc707 > Auto::MemoryScanner::scan_range(Auto::Range const&, Auto::WriteBarrier*) + 919 > 1 libauto.dylib 0x927fcb24 > Auto::MemoryScanner::scan_for_unmarked_blocks(Auto::Subzone*, unsigned long, > void*) + 148 > 2 libauto.dylib 0x927fcd53 > Auto::MemoryScanner::scan_pending_until_done() + 339 > 3 libauto.dylib 0x927fced9 Auto::MemoryScanner::scan() > + 41 > 4 libauto.dylib 0x927f2f98 Auto::Zone::collect(bool, > void*, unsigned long long*) + 152 > 5 libauto.dylib 0x927dca37 > auto_collect_internal(Auto::Zone*, int) + 407 > 6 libauto.dylib 0x927dd36c > auto_collection_work(Auto::Zone*) + 140 > 7 libSystem.B.dylib 0x94a47828 > _dispatch_call_block_and_release + 16 > 8 libSystem.B.dylib 0x94a3a1f4 _dispatch_queue_drain + 249 > 9 libSystem.B.dylib 0x94a39c52 _dispatch_queue_invoke + 50 > 10 libSystem.B.dylib 0x94a39a68 _dispatch_worker_thread2 + > 234 > 11 libSystem.B.dylib 0x94a394f1 _pthread_wqthread + 390 > 12 libSystem.B.dylib 0x94a39336 start_wqthread + 30 > > Thread 5: > 0 libSystem.B.dylib 0x94a39182 __workq_kernreturn + 10 > 1 libSystem.B.dylib 0x94a39718 _pthread_wqthread + 941 > 2 libSystem.B.dylib 0x94a39336 start_wqthread + 30 > > Thread 0 crashed with X86 Thread State (32-bit): > eax: 0x0000005f ebx: 0x92eadcfe ecx: 0x00000000 edx: 0x00000001 > edi: 0x01422250 esi: 0x0021d400 ebp: 0xbfffcf18 esp: 0xbfffcef0 > ss: 0x0000001f efl: 0x00010246 eip: 0x92eadd3e cs: 0x00000017 > ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037 > cr2: 0x0000017c > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. 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